List of Loaded iptables Modules

This is a really old post but here we go:

# lsmod | grep ip

shows a list of loaded modules, which I think most are related to iptables... /proc/net/ip_tables_matches doesn't show modules (at least not in RHEL 6)

Loaded iptables modules can be found in /proc/net/ip_tables_matches proc filesystem entry.

cat /proc/net/ip_tables_matches

In PHP I can access the loaded iptables modules by loading and exploding file contents:

$content = file_get_contents('/proc/net/ip_tables_matches');
$modules = explode("\n", $content);

Of course it requires proc filesystem to be mounted (Most GNU Linux distros mount it by default)